JP2000262136A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester capable of preventing the disturbance in conveyance of a takeover part regardless of a car speed at the time of reaping by installing a plurality of specific means in a threshing and conveying speed changing means. SOLUTION: This combine harvester is obtained by installing a pretreatment conveying device for conveying reaped stem culms at a speed corresponding to a car speed in a pretreatment part for reaping the stem culms and, on the other hand, equipping a threshing conveying device for conveying the stem culms taken over from the pretreatment conveying device along a threshing chamber. Furthermore, the combine harvester is equipped with a reaping end judging means for judging the reaping end of the pretreatment part and a threshing conveying decelerating means for automatically decreasing the conveying speed of the threshing conveying device regardless of the car speed in a threshing conveying speed changing means when the reaping end is judged with the reaping end judging means when installing the threshing conveying speed changing means for automatically changing the conveying speed of the threshing conveying device according to the car speed in the combine harvester.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a combine which changes the transport speed of a threshing transport device according to the vehicle speed.

[0002]

2. Description of the Related Art In general, a pretreatment transport device (including a handling depth transport) for transporting cut stems and culms at a speed corresponding to a vehicle speed is provided in a pretreatment portion of this type of combine while a threshing portion is provided in a threshing portion. Is provided with a threshing transport device that transports the stems and stems taken over from the pretreatment transport device along the handling room, but the conventional threshing transport device has a substantially constant transport speed (the engine speed is interlocked, (The speed is almost the same as the pre-processing conveyance speed during high-speed reaping.) there were.

[0003]

Therefore, it is proposed to solve the above-mentioned inconvenience by linking the transport speed of the threshing transport device with the vehicle speed in the same manner as in the pretreatment transport device. Even if the vehicle speed is linked, at the end of high-speed mowing work, there is a possibility that transport disturbance may occur at the transfer portion. In other words, during the harvesting operation, although the transport turbulence is suppressed by being pushed by the subsequent stem, the transport turbulence is likely to occur at the end of cutting when the number of the subsequent stalks is reduced, and particularly the threshing transport device is operating at high speed. In this case, the stem side of the stem / culm tends to be pulled by the threshing transport device, and there is a disadvantage that the stem / culm does not have an appropriate threshing posture.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been created for the purpose of solving these problems. A combine with a pre-treatment transport device that transports culms at a speed corresponding to the vehicle speed, and a threshing transport device that transports stems and culms inherited from the pre-treatment transport device along the handling room in the threshing unit that has a handling room When the combine is provided with a threshing conveyance speed change means for automatically changing the conveyance speed of the threshing conveyance device according to the vehicle speed, the threshing conveyance speed change means includes a cutting end for determining the end of cutting of the preprocessing unit. The present invention is characterized in that a judging means and a threshing transport decelerating means for automatically decelerating the transport speed of the threshing transport device when the means determines the end of cutting, regardless of the vehicle speed, are provided. In other words, while the threshing transport device is linked to the vehicle speed, the transport speed is automatically reduced at the end of cutting regardless of the vehicle speed. The culm can be taken over, and as a result, the culm can be supplied to the threshing unit in an appropriate threshing posture.
Further, the threshing transport decelerating means reduces the transport speed of the threshing transport device to a preset transport speed. In other words, the transport speed of the threshing transport device is reduced to a predetermined absolute speed, so that the transport speed after deceleration does not become excessive or insufficient, as in the case of relatively decelerating a fixed amount. Irrespective of the vehicle speed, it is possible to prevent the transfer turbulence in the transfer portion. Further, the threshing transport deceleration means completes the deceleration of the threshing transport device by the time the final cut stem culm reaches the start end of the threshing transport device. That is, it is possible to eliminate the disadvantage that the conveyance is disturbed because the deceleration of the threshing conveyance device cannot be performed in time.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing unit 3 for threshing grains from cut stems and culling, and selecting kernels. Tank (not shown) for storing stalks, a post-processing unit (not shown) for discharging threshed culms, an operating unit (not shown) in which various operating tools are arranged, a pair of left and right And the like, and the basic configuration is the same as the conventional one.

The pre-processing section 2 includes a divider 5 for weeding uncut stems, a raising device 6 for raising the weeded stems, a cutting blade 7 for cutting the root position of the stems, and a cutting stem. It comprises a first pretreatment transport device 9 for nipping and transporting the culm to a second pretreatment transport device (handling depth transport body) 8 to be described later. The raising device 6, the cutting blade 7, the first pretreatment Since the engine power is supplied to the transfer device 9 and the second pretreatment transfer device 8 via the traveling main transmission mechanism 10 (hydrostatic continuously variable transmission unit HST), the cutting of the stem and culm at a speed linked to the vehicle speed is performed. And transport is performed.

The second pretreatment transport device 8 has a stock transport chain 11 for transporting the stem side of the stem and a spike carrier 12 for transporting the spike side of the stem. The entire second pretreatment conveyance device 8 is forcibly rotated in the vertical direction about the conveyance end side as a fulcrum based on the driving of a handling depth motor (not shown). That is, the second pretreatment transport device 8 is capable of moving the pinching position up and down based on the forcible rotation upon inheriting the stem at the transport end portion of the first pretreatment transport device 9, The handling depth in the threshing unit 3 can be adjusted by changing the position where the stem and culm are pinched by the threshing feed chain (threshing and conveying device) 13 that takes over the stem and culm at the end of the second pretreatment transport device 8. I have.

Further, the second pretreatment transport device 8 is provided with a pair of tip sensors (not shown) for detecting the tip position of the transport stem and culm at predetermined intervals in the culm length direction. Based on the sensor signal, the second preprocessing transport device 8 is automatically controlled (automatic control of the handling depth) to a proper rotation posture (a posture in which the tip of the transport stem is located between the two tip sensors). The processing is executed in response to an ON signal of the handling depth main sensor 14 for detecting the presence or absence of a transport stem on the front end side of the first pretreatment transport device 9. In this embodiment, the handling depth main sensor 14 is provided for each of the plurality of stem and stem scraping paths, and the handling depth is automatically controlled (with a delay) from the time when any of the handling depth main sensors 14 is turned ON. On the other hand, when all the processing depth main sensors 14 are turned off, the processing depth automatic control is stopped.

On the other hand, the threshing unit 3 comprises a handling room (not shown) in which the handling drum 15 is provided and a sorting room (not shown) in which various sorting devices are provided. And the handling room,
The threshing feed chain 13 receives the tip side of the stem and culm conveyed along the handling room, and threshing the received tip side of the stem and stem by the rotating force of the handling cylinder 15. Is supplied with engine power that does not pass through the traveling main transmission mechanism 10, so that the threshing and the threshing at a speed corresponding to the engine speed (generally, the engine speed is fixed to the rated speed, and the threshing process speed is substantially constant) Sorting is performed.

The threshing feed chain 13 includes a threshing unit 3.
The stems and stems which are arranged in the front and rear directions on the outer side of the stem and conveyed to the end portion of the second pretreatment conveyance device 8 described above in the posture in which the stems and stems are oriented in the left and right direction, and the stem side of the stems and stems that have been inherited. The drive case 18 that supports the drive sprocket 17 of the threshing feed chain 13 at the front end of the threshing unit 3 (sorting chamber) is transported rearward along the handling chamber while being sandwiched between the holding rails 16. The power of the threshing unit is input from the drive shaft 20 of the pressurized fan (Karamin fan) 19 which is installed inside the unit in the left-right direction via the belt-type continuously variable transmission 21 and the power is reduced to reduce the driving sprocket 17. To be supplied.

Further, 22 is a microcomputer (M
PU, ROM, RAM, etc.), the feed chain speed control device 22 having, on the input side, the above-described handling depth main sensor 14 and the continuously variable transmission. A feed chain shift sensor 23 for detecting a shift position 21; a main shift lever position sensor 24 for detecting a lever position of a main shift lever (running shift lever); a vehicle speed sensor 25 for detecting a vehicle speed; an engine rotation sensor for detecting engine rotation 26, a work machine clutch switch 27 for detecting on / off of a work machine clutch (not shown), a work machine rotation sensor 28 for detecting work machine rotation (threshing power rotation), and the like are connected via an input interface circuit. , On the output side, the continuously variable transmission 21 described above.
Is connected via an output interface circuit. That is, the feed chain shift control device 22 has a control program of “feed chain shift control” for controlling the speed of the conveyance of the threshing feed chain 13 in accordance with the vehicle speed and the like. The procedure will be described based on a flowchart. However, in the flowchart, V is the vehicle speed, V1 and V2 are the vehicle speed set values (V1 <V2), VH1,
VH2 is a feed chain speed set value, FDCTGT is a feed chain speed target value, FHSNS is a feed chain speed current value, and α is a dead zone.

In the "feed chain shift control", first, it is determined whether or not the engine is rotating and the work machine clutch is engaged (process A). That is,
It is determined whether or not the threshing operation is being performed. If the determination is NO, the driving of the electric motor 29 is stopped. However, since the combine 1 of the present embodiment includes the work implement rotation sensor 28, The same result can be obtained by replacing the process A with the process B for determining the rotation of the work implement. Further, the processing A or the processing B may be executed at the position C in the flowchart. In this case, even if the determination is NO, the driving of the electric motor 29 to the speed increasing side may be permitted. Will be possible.

If the result of the determination in the process A is YES, the vehicle speed V is calculated based on the main shift lever position and the engine speed (process D), and then the "feed chain speed target value calculation" (to be described later) ( (A subroutine), but the combine 1 of the present embodiment includes the vehicle speed sensor 25, and thus the above process D may be omitted.

After calculating the feed chain speed target value, the deviation (absolute value) of the current feed chain speed value FHSNS with respect to the feed chain speed target value FDCTGT is compared with a dead zone α, and when the deviation is included in the dead zone α. When the motor drive is stopped and the deviation exceeds the dead zone α, the current feed chain speed FHSNS
The electric motor 29 is driven in such a direction as to approach the feed chain speed target value FDCTGT. However, at the time of driving the motor, it is not allowed to stop the motor driving based on the limit judgment, but a timer (speed increasing side) set for each driving direction. A timer or a deceleration-side motor is started, and the motor drive in the reverse direction is restricted until the timer expires.

In the above-mentioned "feed chain speed target value calculation", it is determined whether or not the current vehicle speed V is lower than a vehicle speed first set value V1 (a low-speed running determination reference value).
In the case of, the feed chain speed first set value VH1 (set lower limit speed) is changed to the feed chain speed target value FDCTGT.
Is set to That is, in linking the threshing feed chain speed with the vehicle speed in the same manner as the pre-processing conveyance speed, in a low-speed traveling region where the vehicle speed fluctuation is likely to occur, in order to maintain the threshing feed chain speed at a constant speed, based on the vehicle speed fluctuation during low speed cutting. It is possible to prevent the inconvenience of transport disturbance, and the feed chain speed first set value VH1 is higher than the pretreatment transport speed at the time of low-speed cutting (a range in which the transfer of stems and stems is not significantly disturbed). ,
The thickness of the threshing stem and culm can be reduced at the time of low-speed mowing for cutting the lodging material and the like, so that the threshing load can be reduced.

On the other hand, if the current vehicle speed V is the vehicle speed first set value V1
If the vehicle speed V is equal to or more than the current vehicle speed V, the current vehicle speed V becomes the vehicle speed second set value V
2 (medium speed running reference value), and if the determination is YES, a feed chain speed target value FDCTGT linked to the vehicle speed V is calculated using the following equation. It has become. FDCTGT ← K1 · V + K2 where K1 = (VH2−VH1) / (V2−V1) K2 = VH1− (VH2−VH1) / (V2−V1) ·
V1 In other words, at the time of medium-speed cutting, since the threshing feed chain speed is linked to the vehicle speed, it is not possible to prevent the inconvenience that the transfer disturbance occurs at the transfer portion, and the layer thickness of the threshing stem is maintained substantially constant regardless of the vehicle speed. And the feed chain speed calculated by the above formula is faster than the pre-processing conveyance speed (a range where the transfer of stems and stems is not greatly disturbed).
The thickness of the threshing stalk culm can be reduced at the time of medium-speed reaping of high-harvesting materials and the like, so that the threshing load can be reduced.

The current vehicle speed V is equal to the vehicle speed second set value V2.
In the case of the above, the feed chain speed second set value V
H2 (set upper limit speed) to feed chain speed target value FD
It is set to CTGT. That is, in linking the threshing feed chain speed with the vehicle speed in the same manner as the pre-processing transport speed, the threshing feed chain speed is increased to a set upper limit speed between the medium speed traveling region and the high speed traveling region, and set in the high speed traveling region. In order to maintain the upper limit speed, the threshing feed chain speed at the time of medium-speed harvesting of high-harvesting materials can be reduced as much as possible within a range in which handover of stems and stems is not greatly disturbed, and the threshing load can be reduced, In addition, since the set upper limit speed is set to substantially the same speed as the pre-processing transport speed at the time of high-speed reaping, it is possible to perform high-efficiency work while preventing transport turbulence of the transfer portion at the time of high-speed reaping. I have.

Now, "calculation of feed chain speed target value"
Then, according to the vehicle speed judgment, the feed chain speed target value FD
Prior to setting the CTGT, it is determined whether the above-described handling depth main sensor 14 is ON, and if the determination is YES, the feed chain speed target value FDCTG according to the vehicle speed is determined.
The set processing of T is executed, but when all the handling depth main sensors 14 are OFF, it is determined that the cutting of the pre-processing unit 2 is over, and the feed chain speed target value FDCTGT is determined regardless of the vehicle speed. The feed chain speed first set value VH1 (set lower limit speed) is set. That is, in linking the threshing feed chain speed with the vehicle speed, the end of cutting of the preprocessing unit 2 is determined based on the OFF of the handling depth main sensor 14. At this time, the threshing feed chain speed is automatically set regardless of the vehicle speed. At the end of mowing when the number of subsequent stems is reduced, the stems and stems can be taken over without disturbing the transport posture. At the time of deceleration, the threshing feed chain speed is reduced to the specified absolute speed (set lower limit speed). For this reason, it is possible to avoid such a problem that the transport speed after the deceleration is excessive or insufficient, such as when relatively decelerating a fixed amount.

The time T1 (including the delay time by the acceleration / deceleration timer) required to reduce the threshing feed chain speed from the set upper limit speed to the set lower limit speed is determined by the main sensor position at which the stem and stem are handled during high-speed cutting. Is set to be shorter than the time T2 until the threshing feed chain reaches the start end position. That is, since the deceleration process can be completed before the final cut stem culm reaches the start end of the threshing feed chain 13, it is possible to eliminate the inconvenience that the deceleration process is not performed in time and the conveyance is disturbed. I have.

In the apparatus configured as described above, the pre-processing unit 2 that cuts stems and culms is provided with pre-processing conveyance devices 8 and 9 that convey the cut stems and culms at a speed corresponding to the vehicle speed.
A threshing section 3 having a handling chamber is provided with a threshing feed chain 13 for transporting the stems and stems taken over from the pretreatment transport devices 8 and 9 along the handling chamber, and the transport speed of the threshing feed chain 13 according to the vehicle speed. In order to automatically change the speed, the cutting end of the pre-processing unit 2 is determined based on the OFF of the handling depth main sensor 14, and at this time, the threshing feed chain speed is automatically reduced regardless of the vehicle speed. Even at the end of mowing when the number of subsequent stems and stems decreases, the stems and stems can be taken over without disturbing the conveying posture. As a result, the stems and stems can be supplied to the threshing unit 3 in an appropriate threshing posture.

In addition, since the threshing feed chain speed is reduced to a predetermined lower limit speed, there is no excess or deficiency in the transport speed after deceleration as in the case where a fixed amount is relatively reduced. It is possible to prevent the transfer portion from being disturbed regardless of the vehicle speed at the time of mowing.

Further, the threshing feed chain 13 is not moved until the final cut stem reaches the starting end of the threshing feed chain 13.
Since the deceleration process is completed, it is possible to eliminate the inconvenience that the conveyance is disturbed because the deceleration process cannot be completed in time.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a preprocessing unit.

FIG. 2 is a power transmission diagram of a threshing unit.

FIG. 3 is a block diagram showing inputs and outputs of a feed chain shift control device.

FIG. 4 is a flowchart of a feed chain shift control.

FIG. 5 is a flowchart of a feed chain speed target value calculation.

FIG. 6 is a graph showing a feed chain target speed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combine 2 Pre-processing part 3 Threshing part 8 2nd pre-processing conveyance apparatus 9 1st pre-processing conveyance apparatus 13 Threshing feed chain 14 Handling depth main sensor 15 Handling cylinder 21 Continuously variable transmission device 22 Feed chain transmission control device

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yoshihiro Kawamura 667 Iya-cho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 Within Mitsubishi Agricultural Machinery Co., Ltd. Address 1 F term in Mitsubishi Agricultural Machinery Co., Ltd. (reference) 2B076 AA03 EA03 EB01 EC09 EC11 EC17 ED09 2B084 AA01 BH02

Claims (3)

[Claims] 1. A pre-processing unit for transporting cut stalks at a speed corresponding to a vehicle speed is provided in a pre-processing unit for cutting stems and culms, and the pre-processing unit is provided to a threshing unit having a handling room. A combine provided with a threshing transport device that transports the stem and culm along the handling room, and in providing the combine with threshing transport speed change means for automatically shifting the transport speed of the threshing transport device according to the vehicle speed, The threshing transport speed change means includes a cutting end determining means for determining the end of cutting in the pre-processing unit, and a threshing for automatically reducing the transport speed of the threshing transport device regardless of the vehicle speed when the means determines the end of cutting. A combine comprising a transport speed reducing means. 2. The combine as claimed in claim 1, wherein the threshing transport decelerating means reduces the transport speed of the threshing transport device to a preset transport speed. 3. The combine as claimed in claim 1, wherein the threshing transport decelerating means completes the deceleration of the threshing transporter by the time the final cut stem culm reaches the start end of the threshing transporter.